Master control unit



Nov. 9, 1937. l. M. KEr-:FE 2,098,248

MASTER CONTROL UNIT .Filed July s1, 1951 v sheets-sheet 1 ATTO RN EY Nov. 9, l937. M. KEEFE MASTER CONTROL `UNIT Filed July 31, 19I5l 7 Sheets-Sheet 2 ATTORNEY Nov. 9, 1937. L M. KEEFE MASTER CONTROL UNIT Filed July :51,A 1931 7 sheets-sheet s ATTORNEY Nov. 9, 1937.

L. M. KEEFE MASTER CONTROL uNI'r Filed July 51, 1931 azz ' '7 sheets-sheet 4 INVENTOR L/NcoLN M. KEEFE,

n 'ATTORNEY Nov, 9, 1937. L. M. Kr-:EFE 2,093,248

MASTER CONTROL UNIT Filed July s1, 1951 7 sheets-sheet s Fig. 9.

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INVENTOR ATTO RNEY Nov. 9, 1937. L M KEEFE 2,098,248

MASTER CONTROL UNIT "Filed July s1, 1951 7 sheets-sheets Il... O O C l vcotone. nascono ATTORNEY y Nov. 9, 1937. L, M. KEEFE 2,093,248.-

MASTER cNTRoL UNIT Filed Ju1y`51, 1931 '7 sheets-sheet 7 FU aooooo INVENTOR LINCOLN M. KEEFE.

' ATTORNEY record controlled apparatus,

Patented Nov. 9, 1937 UNITED STATES PATENT OFFICE spaans msnm coN'rnoi. Umr Lincoln M. Keefe, Springfield, Mass.Y I Application July s1, 1931, smal No. 554,191

This invention relates to 'a control device for and more particularly to a device forming a master control unit adapted to be attached to existing record controlled devices to automatically and selectively control rthe apparatus and/or one or more functions thereof. rThe functioning of this master control unit as distinguished from existing controls is hereinafter more fully defined.

An object of the invention is to provide a master control unit that may be readily attached to existing record controlled apparatus, suchyfor instance, as a. tabulating machine, to increase the uses or range of work to which the machine may be applied.

Before stating other objects of the invention. it is desirable to briefly refer to the present state of the art, particularly in respect to tabulating machines which, by way of illustration will be used in connection with the following description of the master control unit.

The present application describes and claims a device particularly suited to carry out the method of controlling record controlled devices as described in the pending application for patent, Serial No. 549,449, filed July 8, 1931.

The invention may be used with record controlled devices. y

The "record" may comprise any suitable means for causing electrical or mechanical action to take place and may consist of a card, stencil,

paper tape or the like, having holes or perforations therein or tabs projecting therefrom. r the record may be impregnated at desired points .with a liquid which will make the record an electrical conductor at said points, or the record may have metal inserts therein, or may be of metal with non-conducting inserts therein; or may be of any material having colors, marks or symbols thereon adapted through the medium of light sensitive means, to cause a change in state in an electrical circuit for the purpose of operating electrical or mechanical devices under the control, thereof.

There are many machines controlled or adapted to be controlledby records to which this master control unit is applicable. Some of such machines are punchingfsorting, tabulating, interpreting, addressing, folding and inserting machines; those for collating records and the like; machines for packing, and machines adapted to be controlled by cards and the like for weaving, knitting, printing, embossing, engraving and moulding. The invention is also applicable to machines for die sinking and metal cutting` adapted to be controlled by a pattern or record, including the operation of screw machines and the like where a relatively inexpensive record can be made to replace the cams heretofore used. y

'I'he master control device may be applied to the foregoing and many other machines by the use of suitable electrical or mechanical instrumentalities, the latter including pneumatic and hydraulic means, such as a series of control valves or the like. The exact means necessary to carry out the invention is immaterial and is dependent upon the type of apparatus or equipment it is desired to control, and the controls already in such apparatus, equipment or device. E In order to describe the use oi' the master control unit as applied to a mechanical device in common use, it will be described as employed in connection with a well known electrical tabulating machine as described in the patent to Lake et al., No. 1,775,132, dated September 9, 1930, and in order to point out the advantages obtained by the use of this device an example or problem showing its use in connection with the operation of the said tabulating machine will be given.

Tabulating machines are used where it is desired to accumulate, print or list quantities represented by perforations in record cards such as those hereinafter described. In many cases it is desired toprlnt only from cards having a particular hole or combination of holes therein and from no others, although the cards from which it is desired toprint maybe and often are indiscriminately scattered through a large number of cards. The procedure heretofore has been to sort out the wanted cards'from the other cards by putting all of the cards through'a sorting machine which, by suitable mechanism under the control of the holes in the cards, sorts out the wanted cards and segregates them from the others.

As such sorting machines'are well known, it is not necessary to here describe them in detail.

Assuming that the wanted cards have been sorted out by the sorting machine, they are passed through the tabulating machine and after the desired data is obtained therefrom the cards are usually reaggregated with the cards from which they were selected and the entire group of cards reassembled in their original orderpr sequence.

'Il'he printing-tabulating machine is herein de, scribed only in sufficient detail to enable the functioning of the present invention therewith to be understood. A typical machine such as that described in the aforesaid patent consists of:

Element Group (1) .-A card feeding [device by means of which the record cards are passed through upper and lower sets of brushes, there being an upper and a lower brush for each vertical column on the record card, these brushes being adapted to establish an electrical contact through perforations in the record cards. (In other devices this sensing means could be operated by any other suitable indicia on the card or record.) For the purposes of this specification, this feeding and contact mechanism may be termed the feed end of the machine or sensing means.

Element Group (2) .-A plurality of accumulators (which may or may not have printing devices associated therewith) and this portion of the mechanism may, for the purposes of this specification, be termed an accumulator means or differentially-positioned means. This means has its own controls, operated by some of the impulses from the sensing means.

Element Group (3).--A plurality of machine control devices comprised of a group control mechanism, relays and cam actuated contacts and circuits controlled thereby for controlling the operation of both the tabulating motor and the reset motor, which may be placed under the control of the sensing means and, in accordance with perforations therein, control the operation of the machinethat is to say, the starting and stopping of the mechanism and the mechanical actuation or movement of the printing devices when the latter are used. These controls are operated by some of the impulses of the sensing meansusually others than those that operate elements in Group 2. For the purposes of this specification, Element Group 3 is termed machine con- 'trols".

The elements under Groups 1, 2 and 3 above each terminate in jacks conveniently grouped upon a plug board, and cords with a plug on each end are provided whereby the various jacks may be interconnected at the will of the operator so that any lower brush in l may be connected to any counter in 2 and so that circuits can be established between the upper and lower brushes which willinclude one or more of the machine controls 3.

The various Element Groups l, 2, 3 of existing tabulating machines may therefore be connected together in various combinations. However, with such machines the accumulator means and printing bars (Element 2) can only be connected to one set of brushes. The magnets operating these registers and printing bars have the return wires therefrom permanently connected to the same side of the line as the contact roll which cooperates with the upper brushes. The other end of the winding of each of these magnets is led to a series of jacks. The contact roller cooperating with the lower brushes is connected to the opposite side of the line, to that of the contact roller ofA the upper brushes. In other words, if, for example, the contact roller cooperating with the upper brushes is connected to the positive side of the line or current supply, the contact roller coop eratlng with the lower brushes is connected to the negative side o1' the line. Therefore, as the return wires of the magnets operating the registers and the printing bars are permanently connected to the upper brushes these elements can only be operated when connected to the lower brushes. They cannot upon each other, nor can they interact with the machine controls (Element Group 3) e" they are desiree-'i to receive impulses rather t zo set up paths wthin themselves to transmit to other elements.

To cause the machine controls 3 to function, they must be included in a circuit including brushes in both sets, (upper and lower) and the relays associated with these controls cannot act upon each other. These elements are adapted to actuate contact arms within the machine. These contact arms are permanently connected or strapped together in series internally and connections from these straps are brought out to jacks so that one or more sets of contact arms may be included in the series. After being actuated by a magnet, or magnets, these contact arms are mechanically reset by cams within the machine. One (usually the end one) of these contacts is permanently connected within the machine to elements that control the operating and printing cycles of the machine. Therefore, as these relays are designed and so connected to the controls of the machine they cannot interact with the accumulators 2.

Examination of the circuits, when the machine is set up in any possible working combination, will reveal that original impulses set up by the sensing means travel directly to the operative controls of the accumulators 2 or directly to the machine controls 3. No combination of connections can be made whereby the different controls 2- may interact upon each other and the resultant effect of said interaction cause the machine to function or control; nor can any connections be made to produce this eiect upon the controls 3; nor can any combination of 2 and 3 be obtained.

The accumulators 2 may be said to constitute one group of elements of the machine. They may add, subtract, operate counters of various types, set printing bars and the like as distinguished from the group of control elements 3 which control the starting, stopping of the machine, the feeding of cards therethrough, operation of printing mechanism and the like.

The improved control device herein described, which constitutes the invention, to distinguish from the control means of the prior art, is termed herein master control unit, and contemplates the inclusion in the connecting means for the various elements of the machine (in this case in the cords before mentioned) of suitable l relays, all circuit terminals of which are brought out so they may be connected in an almost infinite number of combinations to produce new and useful results. These relays may be of different types and degrees of sensibility, or adapted to operate in different degrees of time, in order to produce the desired control.

This master control when used in connection with a tabulating machine or other device constitutes a fourth group of elements, the other three elements thereof being those heretofore mentioned. Of course this fourth element need not be arranged in the cords, as above referred to. It can be placed anywhere, provided it is in changeable relation to the other elements and their existing controls. In other words, the relays of the master control unit may be conveniently grouped and. all circuit terminals of each may be brought out to jacks and located so that the plugs of the cords before mentioned can be used to inter-connect the same with the elements in Groups l, 2 and 3 of the tabulating machine. g

It will be apparent from the following specification that the master control unit permits of having original impulses, set up by the sensing means, enter the operative magnet coils of the master control unit where they actuate contact 'actas-1s arms and set up a circuit or path through which an impulsermay pass., This impulse maybe termed an actuating impulse and it may, for example, pass to elements 2 and/or element 3 of the machine. This impulse may be under the control of the sensing means, or may be originated elsewhere. It may originate from a hole `in the record card nearer the top thereof, for

lexample, a hole in the 1 row or the 0 row, so that the circuit through the master control will `have time to be set up by holes in the lower rows 'of the card (9, 8, 7, 6, etc.), and may pass theresthrough, or be controlled, modified or changed in character, in time, in value, therein, finally passing to the functional 2 and/or operative confully be described hereinafter.

obviously, the nexlbuay of existing tabulating machines is limited to the number of interconnections possible between the groups of elements 1,- 2 and 3 made possible by the plug and jack connections before mentioned as well as for other reasons that are apparent from the foregoing, and an object of this invention is to provide a master control unit whereby further sub-division of the connections between the various elements of a tabulating machine is effected, this control constituting a fourth group of elements, inter posed in changeable relation (adapted to be switched or plugged at the will of the operator) in said connections adapted to control the existing controls or the impulses -or electric currents flowing through the several circuits of the machine in order to increase the flexibility thereof and to enable the machine to be set up to secure numerous and various results heretofore impossible, or to perform known problems possible with existing machines with a saving in time.

A further object of the invention is the elimination of the sorting operation often heretofore necessary in order to obtain selected cards from which certain information is desired.

Another object of the invention is to prevent or permit impulses to ow in selected circuits of a control device, in order to provide automatic control therefor entirely under the control of the record used therewith. This is accomplished 'by having impulses from the sensing means under control oi' the record disable or enable selectved circuits in the control device whereby other impulses from the record or some other source are prevented or permitted to flow therethrough to one or more elements of .the machine.

Another object is to provide a master control unit whereby a predetermined combination of impulses or currents maybe selected to control and direct al single operating impulse of current in order that the latter may function to produce a desired result. 'I'he predetermined combination of impulses from a record passing to the master control unit set up a circuit therein through which an operating impulse` from the same record card may pass to an element of the machine to produce the desired result. Groups of record cards may be passed through the machine but only records having holes therein in accordance with the predetermined combination will set up the circuit for the rperating impulses to pass through, therefore, record cards not having the predetermined combination upon passing through will Vnot register.

Afurther object of the invention is to provide a device whereby ,the timing of the currents or impulses in record controlled devices may be apparently changed bythe substitution of one impulse for another, thereby changing the numerical value thereof. For example, if it were desired to change the numerical value of an impulse from a column in the 9 rowr on the record-card to a numerical value of 5this could be accomplished by having the hole in a given column in the 9 row actuatea relay in the master control unit and set up avcircuit through which an impulse of a value of 5,may pass, therefore substituting the 5 impulse for the 9 impulse.

Another object of the invention is the provision of one or more electrical devices which may be interconnected in a record controlled device ata point in the circuits thereof between the f eed end ,or sensing means and the accumulating means and/or machine controls, to increase the usefulness of the device. One method of accomplishing this is Kto inter-connect electrical de^ vices in the master control unit between the sensing means and the registering means and/or machine controls in such a manner that certain predetermined data correspondingJ to indicia Iin certain positions on some of the cards will Another object is to provide a master controly unit adapted to control the functioning of a record controlled device by a series of key impulses whereby upon the passing of cards therethrough if any one of the key impulses fails to materialize the particular function does not operate.

Another object of the invention is to pass from records, impulses in an unknown order, to a device adapted to translate only the impulses from those records which pass impulsesin a predetermined combination, without disarranging the order or sequence of. the records, some of which may not be able to `,pass impulses in the said predetermined combination.

In order to define selectivity-as employed in this specication and the appended claims, and to avoid. a lengthy'comparison of the method of selectivity herein disclosed with methods heretofore known, it is desirable to state that the prior art as previouslyreferred to herein relative to tabulating machines contains examples of Aselectivity wherein the operator connects the `or major group individually.

Obviously, the selectivity so obtained is limited, and while it has been heretofore termed automatic, should not be confused with superselectivity as thatv term is hereinafter employed, as the type of selectivity herein referred to cannot be obtained by known devices, the various elements in Groups l, 2, 3 of a tabulating machine being permanently connected internally as demanner in accordance with the manual preselection of circuits and connections made.

For example, the operator of a tabulating machine may connect the sensing means l to be operated from certain columns on the card to a. machine control 3 and at the same time connects certain accumulators 2 to be operated from certain other columns on the card. This is the limit of the selectivity of the machine. The .accumulators cannot act on each other, nor can the control be aiected by the accumulators. The cards must be arranged (sorted) to cause the machine to function in accordance with this set up, and the results are correspondingly limited.

By the use of the present known tabulating machines such problems as that herein given using unsorted cards and requiring automatic selectivity (in the sense that term is herein employed) cannot be solved for reasons that are apparent from the following specification.

Therefore, by super-selectivity is meant that degree oi selectivity attained when the machine elements themselves connected up as described, automatically select by means of impulses under the control of the cards, some of which impulses will occur in known timing or sequence and some in unknown timing or sequence; the cards need not be sorted or disassociated from other cards from which no selection is to be made and the entire'problem is solved in one operation of one machine.

The machine elements are, by the addition of the master control unit, controlled by the cards, automatically given various functions as distinguished from the fixed functions they possess in existing machines. The machine controls 3 and the accumulating means 2 may act upon each other, and the various combinations possible with the master control unit herein disclosed are almost infinite.

Other objects and advantages of the invention will be apparent from a preferred embodiment thereof and several examples of the uses thereof, as illustrated in the accompanying drawings in which:

Figure l shows an eighty column tabulating machine card laid out in a form such as would be used by a department store and suitable for illustrating the invention;

Figure 2 is a circuit diagram showing a plug board and relays of the master control unit having all operative points terminated therein in jacks and comprising one form of master control unit device which may be used to carry out the invention;

Figure 3 is a iront view of a preferred embodiment of the invention showing the arrangement of the jacks and switches thereof;

Figure 4 is a rear view of the device shown in Figure 3 depicting the arrangement of the elements within the master control unit;

Figure 5 is a section along the line 5 5 of Figure 4 showing one form of relay and the jacks associated therewith, in the master control unit; Figure 6 is a section along the line 6-6 of Figure 4 showing a second form oi' relay and the jacks associated therewith;

Figure 7 is a section along the line 1-1 of Figure 4 showing a third form of relay and the jacks associated therewith, in the master control unit;

Figure 8 is a section showing another form of relay suitable for use in the device;

Figure il is an elevation of the lower part of `scribed above and always functioning in the same a well-known tabulating machine showing the plug board thereof with a master control unit positioned thereon and constituting this invention wherein connections between the plug board of the device and the plug board of the tabulating machine, and the connections between some of the jacks of the sensing means and of the recording means on the tabulating machine are connected for the rst problem given herein;

Figure 10 is a diagram o'f connections same as shown in'Figure 9 except that the circuits of the relays of the master control unit, actually used in the rst problem, are shown diagrammatically so that the circuits therethrough may be traced with greater facility;

Figure 11 shows the plug board oi a tabulating machine, and the plug board of the master control unit connected up for a second and more complex problem;

Figure 12 is a suitable form of stencil list showing how the tabulating machine interconnected with the master control unit, records the results thereon in connection with the ilrst problem given herein; and

Figure 13 is the same form oi stencil list as that shown in Figure l2, showing how the tabulating machine interconnected with the master control unit described and claimed herein, records the complex results thereon;

Figure 14 is a diagrammatic sketch showing a card feeding device, upper and lower brushes and a card receiving device constituting a sensing means; accumulating and printing devices constituting entry receiving means, and relays adapted to control the operating and printing cycles of the machine, constituting a machinecontrol means.

Two types of cards are in general use in tabulating machine work. One type has 45 vertical columns and the other has 80 vertical columns. Both types have 10 horizontal rows of numerals from 0A to 9 inclusive and sometimes two rows may be used above the 0 row. For illustrating this invention and the use of the same in connection with tabulating machines, a layout on an 80 column card is used, such as the one shown in Figure 1 wherein columns l to 12 inclusive are utilized to provide on the cards, impulses of known timing and value because they will be the same on all cards used as of the problems submitted.

Columns 16 and 17 may be used to designate the store. The year may be designated in column 18. Columns 19 to 27 inclusive are used for recording information about the customer, such as ledger, line, sheet, state, etc. Column 27 may be leftl open so that in the event a customer does not want advertising matter the 9 in this column may be punched and the control so connected that the name will not be selected.

Columns 28 to 52 inclusive represent the departments in the store and column 53 represents the total departments of the store in which purchases were made by the customer, during the months of February, March, April, May, June and July, the horizontal rows of numerals in these columns representing these months. For example, the row of 3s represents the month of February, the row of 4s represents the month of March, the row of 5s the month of April, etc.

Columns 54 to 78 inclusive represent the same departments as 28 to 52 and column 79 represents the total departments of the store in which purchases were made by the customer, during the months of August, September, October, `November, December and January, the horizontal rows of numerals in these columns representing these months. For example, the row of 3s represents the month of August, the row of 4s represents the month of "September, etc. Columns 5l and 19 have no reference to any totals of amounts of purchases, but merely represent the total departments in which the customer made purchases.

'Ihe two boxes formed at the top of they card' above the oblique lines indicate the two sixmonth periods, and it will be noted that the box on the ,left contains the words February-July and the other box contains the words August- January", indicating that the first six-month period begins with February and ends with July, and the secondI six-month period begins .with August and ends with January. The horizontal row of 3s in the first six-month period corresponds to the month of February, and in` the second six-month period corresponds to the month of August.

Column 99 is used for total number of departments in which the customer made purchases during the previous year or-season. Although the card (Fig. l) apparently shows two extra columns at the right hand edge it will be noted that they are not numbered at the bottom as the other columns are. 'Ihey are filled in .by

hand and are placed on the card as a key to idenf tify the horizontal rows of the card with months as will presently be described.

One card is made up for each customer and the cards are punched, say, at the end of each month, for the activities during that month, as

of digits and mlonths rather than amounts of purchases. In other words vby activities is meant the purchase of goods in the various departments, and on a given card of any customer if a purchase were made in any department, no matter how large or small it might be, a hole would be punched in `that customers card in the horizontal row representing the month and the vertical column representing lthe department. As to the digits and months, it will be noted from the card form that the digit 3 in the rst sixmonth period represents the month of February, while the digit 3 in the second six-month period represents the month of August. 'Ihe two columns added to the right hand edge of the card, beyond the eightieth column, are placed there as a key or guide in determining the months, the first of these columnshaving the numerals 2 to 7 therein, representing February to July, and the second of these columns having the -numerals 8, 9, 10, 1l, l2, 1, representing August to January. It it were desired to record the amounts of the purchases in the various departments a different card form would be used, but for the purpose of illustrating the invention a card of the form shown in Fig. 1 is herein described. No assembled data are shownon the card in the drawings because it is thought that the description of the' method of recording the activities in the various departments, as will presently be described, will be more understand travel through the sensing means in such a manner that the horizontal 9 row passes the brushes of the sensing means first, followed by the 8, 9, etc. Therefore, if a hole is punched in the 9 row in any given vertical column and also, infor example the 7th and the 4th row in the same column, the 9 will register and the 'I and 4 will have no effect.` .By means of the improved device herein described this condition does not necessarily obtain. The value of any digit in-any given row may be utilized, and unaffected by any other punched hole in the same column, as will presently be described.

v The oblique columns atthe mtop of the card have numbers placed therein, representing the numbers of the various departments, for example, |9|||I2 represents the shoe department as a whole, although |9| may stand fr sport shoes and |02 for dress" shoes.

Suppose the cards were for store No. 12, a

- hole, wou1d b e punched in the i rov in che 16th column and a hole punched in the 2 row vin the 17th column, and in columns |9` to 21 inclusive the information about the customer would be punched.

Now suppose the customer represented by a given card had bought in the toilet goods. hosiery. shoe .and millinery departments during the month of May; holes would'be punched in the 9 row in columns Il, Il, I9 and Il.

Or if purchases were made in these same departments during the month of August the holes "brushes |99 which contact with a roller |89, and a lower row of brushes |91 which contact with another roller |99. When' the cards pass between the row of brushes |99 and the roller |99,

no contact is made except at points where holes have been punched in, the cards with a timing according to the row in which the punched hole occurs. After passing the upper brushes, the cards pass between the lower brushes |9| and their associated roller |99. 'Ihis is the element heretofore designated (l).

lThe tabulating machine also has a series of adding dials or counter mechanisms, with a series of printing bars associated therewith. 'I'his element is heretofore designated (2). A These instrumentalities are shown diagrammatically in Fig. 14 and designated generally by the numeral |99.

The machine also has a series of built-in machine controls. 'Ihis is the element group heretofore designated I.

To facilitate interconnecting, these elements of the tabulating machine terminate in a series of Jacks in a plug board designated by the numeral |00 as shown in Figure 9.

The upper brushes are connected to the Jacks DU numbered fronti to 99 in fives and hereinafter `a particular upper brush Jack will be designated, forexamplaas DUI, meaning the jack connected to upper brush in column No. 5.

As the lower brushes (only) cause the accumulating and printing elements t function because the return wires from these elements are connected to the same side of the power lineas the contact roller ofthe upper 4brushes which is of opposite polarity to the roll with which nthe lower brushes contact, these brushes are connected to a row of jacks, three jacks to each brush, each group of 3 being numbered from to 90, designated as DL. These jacks are so arranged that the jacks from the lower brush in any given column are directly below the corresponding upper brush jacks. For example, the upper brush jack DUI5 has its corresponding lower brush jacks DL|5 located directly below and in line therewith. By means of the triple jacks any of the lower brushes may be connected to more than one instrumentality in the machine.

In order to keep the plug board, designated by the numeral |00, down to a minimum width, the rows of jacks DU and DL are made up into two groups with the jacks from to 40 inclusive in the upper group and from 4| to 90 inclusive in the lower group, as shown in Figure 9. The eighty upper brushes |99 are arranged in one single row in the machine and they are so arranged that they register with the eighty columns in the record card. The eighty lower brushes |9| are arranged in the same manner and are positioned a distance equal to the height of a record card away from the group of upper brushes |99.

The magnets for effecting the control of the operative and printing cycles of the machine (shown diagrammatically at |92 in Fig. 14) terminate in two rows of jacks in the plug board |00 and are designated as FU and FL. The FU jacks are adapted to be connected to the upper brush jacks DUand the jacks FL are adapted to be connected to the lower brush Vjacks DL.

For a given control to function, lts jacks must be connected-one to an upper brush jack and one to a lower brush jack--in order to complete the electrical circuit therethrough.

A plurality of shunt jacks FS form the terminals for a series of contact arms |94. These contact arms are actuated by the control magnets |92 and are reset by cams (not shown). 'I'hese jacks are adapted to b'e plugged with a major control shunt 93 or a minor control shunt 84. One of the contact arms |94 (usually the end one) is connected to instrumentalities in the machine which cause the machine to continue to run or stop and print, etc. These instru` mentalities (not shown in detail) are indicated generally by the numeral |95. These instrumentalities are connected via the wire 202 to the negative side of the source of current; they are connected via the wire 209 to the tabulating motor |91; connected via the wire 204 to the printing 'motor |99; and some of them are also connected to a shunt contact. |94.

A series of jacks L are connected in common for convenience where several plugs must be connected together. For example, if it were desired to connect the upper brush jack l0 to four other FU jacks, a plug wire would be connected from the jack DU|0 to one of the jacks in L, and plug wires could be run from four other jacks in the row L to the required four of the FU jacks.

Several banks of jacks are connected to a series oi accumulators and/0r printing bars (Element Group 2) and Adesignated E, Figures 9 and 10, each bank containing eight jacks in the crder of l to 8 counting from right to lett and they may be connected by plugs to other jacks on the plug board, for example, to the lower brush jacks. The counter magnets, printing magnets and transfer mechanism is shown diagrammatically at |99 in Figure 11, and one jack E is also shown therein.

In one form of master control unit suitable for carrying out the invention, shown in Figures 2 to 8 inclusive, a plug board 95, Figure 2, is provided and has connected thereto a bank of relays. The terminals of all of the elements of these relays terminate in jacks and switches in the plug board 95. These relays are of three general types.

(Ra) A relay which opens one set of contacts upon receiving an impulse and causes a second set of contacts to make whereupon they remain in this relation until an impulse is sent through a reset coil thereof and contact between the second set of contacts is broken and the first set again makes contact, the contacts being oppositely disposed.

(Rb) A relay which holds a pair of contacts closed only during the life of an impulse.

(Rc) A relay with a slow acting coil and a fast acting coil, and having two pairs oi contacts adapted to be closed by each of the coils alternately, each of which remains closed until broken by the action of the coil closing the other or opposite pair of contacts, the contacts being oppositely disposed.

Resistors or resistance units, shown in Figures 4, 5, 6 and 7 are not shown diagrammatically in Figure 2 for the sake of simplicity. However, resistance units may be used in series with the windings of the actuating magnet coils when the resistance of the latter is low enough to overheat if connected directly across the line, and in cases where the resistance of the coils is high, the resistors would not be necessary. l

The plug board 95 with the relays and the connections thereto are shown diagrammatically in Figure 2 in which the relays RI to R|9 inclusive are of the type described in Ra above, the relays R.|9 and R20 are of the type Rb and the relays R2| and R22 are oi.' the type Rc.

The relays RI to R|9 normally, as described in connection with RI in Figure 2, have the contact arm 93 making contact with the contact arm 94 which is retained in this relation by the locking armature 99 until an impulse passing through the coll 91 attracts the armature 99 and allows the arm 99 to break contact with the arm 94 and establish contact with the contact arm 95 and remain in this relation until the reset coil 99 is energized.

The reset coil 99 pulls the arm 93 away from the arm 95 breaking contact therewith and again establishing contact with the arm 94, whereupon the spring 99 pulls the armature 99 up and locks the arm 99 in this relation. v

The letters B, H, M and C, Figure 2, indicate certain rows of jacks on the plug board 95 and stand for break, "hinge", make and coil, respectively, and the numbers at the tops of the columns (1 to 18) each indicate a relay.

The contact arm 99 of relay Rl is connected to the jack H in column 1 of the plug board 85, and the corresponding contact arm of relay R2 is connected to the jack H in column 2, etc.

Likewise the contact arm 94 of the relay RI is connected to the jack B in column No. 1 and the corresponding contact arm of relay R2 is connected to the jack B in column No. 2, etc.

The contact arms 95 of the relays RI to RIB inclusive are connected to the jacks M in their Vrespective columns.

Lead wires from each actuating coil 91 of these 75 E acescs f relays are connected to the Jacks C in their respective columns, and the return wires of the actuating coils 01 are connected in common in ZTOUDBI One group comprising the return wires 201 from the actuating coils 01 of relays RI, R2, R0, RA, R0 and R0 inclusive are connected to the jacks |0| and |02 and to one side of a switch |03.

A second group comprising the return wires 200 from the actuating coils oi' relays R1, R8, R0, RIO, yRII and RIZ inclusive are connected to jacks |00, |00, t'o one side oi' the switch |06 and to the other side of switch |00.

' A third group comprising the return wires 200 from the actuating coils of relays R|0,R.|l, RIB, R|0 and Rll inclusive areconnected to Jacks |01, |00, to the other side of the switch |00, and to one side of the switch |00.

The connections for the other side of the switch |09 and forcthe return wire of the actuating coil in relay R|0 willv be described latery as well as a certain function this last named relay is adapted to perform.

The switches |03, |00 and |00 are single pole and are open when thrown to the left, as shown in Figure 2, and closed when thrown'to the right.

A connector corc ||0 has a connector plug for connection o the same source ci' power that supplies the tabulating machine. 'I'his cord leads current via the fuses 2, ||3 to a vdouble pole double throw switch Ill, the back of which is shown dlagrammatically at H5.

For the sake of illustration, the wire ||0 is ast sumed to be of negative polarity and the wire ||1 is of positive polarity, although these polarities maybe reversedby means of the double-- pole. double-throw switch shown at Il-IB.

The wire is connected to the jack ||8 and 'to the other side of theswitch |09.

lower brush jacks DL on the tabulating machineA as these are of opposite polarity to that of the upper brushes and should be so. for current' to ow through and operate the actuating coils in the relays. If the polarlties of the brushes in a tabulating machine are oppositek to those just stated, the actuating coils in the relays will not operate because there will be no potential difl'e'- ence across the terminals and by throwing the switch ||l to the opposite sid, the polarities of these relays will be reversed with respect to the polarities of the brushes in the tabulating maneet to any circuit) to keep the cable from danchine and the actuating coils would operate.

In some cases it is necessary to have some of the relays operated by the upper brushes also. Suppose one or more relays in the group RI to R6 inclusive and in the group RII to RIT inclusive is operated by the lower brushes, and one or more in the group R1 to R|2 inclusive is operated by the upper brushes, switch |00 would be thrown to the right; connecting the actuating coil return wires of relays RII to RI'I inclusive to wire I1; switches |00 and |02 would be thrown to the left, disconnecting the other return wires from wire Ill; a plug cord would be used to ccnnect the jack |00, which is common with the return wires of the actuating coils of relays R1 to R|2 inclusive, as above statedy to jack ||0 which would connect the actuating coil return wires of `relays R1 to RIZ inclusive to the wire` IIB which is of the same polarity as the lower brushes in the tabulating machine; and a plug cord would be used to connect the jack |0| to Jack Ill, which would connect the actuating coil return wires of relays RI to R0 inclusive to wire Ill, which is of the same polarity as that of the upper brushes.

'I'he C jacks of the actuating coils of the relays in the group R1 to R.|2 would then be connected X to the upper brush jacks DU and impulses thereover would operate 'the same, and the C jacks of the relays in group RI to R6 inclusive and RII to RIT inclusive would be connected to the lower brush Jacks DL and impulses thereover woul Y 20 lof power towhich the tabulating machine is connected and it happens that the wire i0 is of the same polarity as the upper brushes and the wire ||1 is of the same polarity as the lower brushes the relays would not function as before stated, but vreversing the switch ||4 would make the polarities right, relative to the tabulating machine, and the relays would function.

The return'wires of the reset coils 98 of the relays. RI to Rl 1, inclusive, are shown connected in common with each other and to the wire Ill. These return wires could Just as well be connected to the wire ||6 or be connected to a jack which could in turn be connected to either side of the line (I I0 or but as itis convenient in the,l

problems illustrating the invention to have the resetting of these coils operated by a lower brush the connection above stated is shown. However, other relays in the master-control unit are arranged so'that the reset coil return wires are individually connectible to either side of .the line, as will presently be described.

The cable 2| connects to one side of each oi the reset coils 08 of relays RI 'to R9 inclusive and also to the jack |23, and may be plugged into any brush jack in the plug boardv |00 of the tabulating machine, for example, one of the lower brush Jacks connected to a brush adapted to contact through a punched hole in'a card for timing the reset operation. f

A second cable |22 connects to one side of each of the reset coils of relays Ri 0 to RIB inclusive and may be plugged into the jack |23 whereupon these reset coils would operate in unison with those connected to the cable |2|.

If relays in the group RI to R9 only are being used, the cable |2| would be plugged into the proper column in the plug board |00 oi' the tabulating machine and the cable |22 would be plugged into the jack |24 (which does not congling on the door. This would not allow the reset coils in relays R|0 to Ril to operate, with a saving in wear. y

Likewise if the relays R|0 to R|8 only are being used, the cable |22 would connect to the proper column in the tabulating machine plug board |00 and the cable -|2| would be plugged into the :lack ,|24.

A condenser l may be connectedffrom (the connection to) cable |2| to the wire |30, and likewise a condenser |00 may be connected from (the connection to) cable |22 to the wire |00.

These condensers are provided so that in case a condenser is used in the .tabulating machine/75,

connected across the impulse distributor to prevent sparking therein, this condenser will not be overloaded.

Relays R|9 and R20 are of the type Rb referred to above in which the actuating coil thereof holds a pair of contacts closed only during the life of an impulse. These relays, shown at R|9 and R20 in Figure 2 are connected to jacks in the columns YI and Y2 respectively. For convenience the description is made in connection with relay R20, but it also applies to RIS. A contact arm connects to the jack in the H row in column Y2. This arm, when the magnet |21 receives an impulse, is attracted and contact is made with the arm |26 which is connected to a jack in the M row in column Y2.

One end of the magnet coil is connected to the jack in the C row under column Y2. The other end of this magnet coil is connected to the center Contact of a single pole double throw switch |29.

The single pole double throw switches |28, |29, |30 and |3| each have one side thereof connected to the wire ||1 via the wire |32, and each opposite side thereof connected to the wire IIB via the wire |33, so that (using |29 for an example) the actuating coil |21 may be operated by either the upper or the lower brushes. Assuming the same poiarities as described above, suppos it is desired to operate this coil by means of 'an upper brush, in which case a plug wire would run from the C jack in the Y2 column to an upper brush jack DU and the switch |29 would be thrown up as shown in Figure 2. The return circuit may be traced as follows: from the switch |29 to the wire |33 to the wire IIS. It it is desired to operate this actuating coil |21 by means o! a lower brush, the C jack in the Y2 column would be plugged toone of the lower brush jacks DL and the switch |29 would be thrown down (0pposite to its position shown in Fig. 2). In this case the return wire may be traced from the switch |29 to the wire l|32 to the wire |25 and to the wire ||1.

The relays R2| and R22 are of the type Rc referred to above, each having a slow acting coil and a fast acting coil, a pair of contacts associated with each coil and adapted to be operated alternately by each of the coils, one pair of contacts remaining closed until broken by the action of the coil closing the other or opposite contactsthus when one pair of contacts is closed, the other pair is open.

These two relays are connected to the jacks in the columns Zi and Z2. For convenience the description is made in connection with the relay R2| but it also applies to R22. The contact arm is connected to the jack in the H row in column ZI, the contact arm |38 is connected to the jack in the B row in column ZI, and the contact arm |31 is connected to the jack in the M row in column ZI. The fast acting magnet coil |38 has one end connected to the wire |32, which in turn connects to the wire I|1, and its other end connected to the jack in the X row in column ZI The slow acting magnet coils above referred to consist of magnet coils having windings thereon with a short length of the core extending beyond the winding. A heavy copper washer or slug is placed on the core. This slug retards the building up of magnetic iiux in the core and as such coils are Well-known in the art they are not herein described in detail. The slow acting magnet coil |39 has one end connected to the jack in the C row in`column Z| and its other end connected to the center contact of a single pole double throw switch |30. One side of the switch |30 is connected vla the wire |33 to the wire H6, which is one side of the line from the connection plug and the other side of the switch is connected via the wire |32 to |I1 which is the other side of the line, and by means of this single pole double throw switch, one end of the magnet coil |39 may be connected to either side of the line desired.

When the magnet coil |30 operates, due to an impulse from the tabulating machine passing thereto via a cable plugged into the X jack in column Z| and via the wire |32 to the side of the line of opposite polarity to that of the source of the impulse, the contact arm |35 is attracted and contact is established with the arm |36, thus closing the circuit across the jacks H and B in the ZI column, at the Lsame time the spring |4| pulls up the lever I 40, thereby locking the arm |35 in this position.

An impulse via the Jack C in the Z| column energizes the coil |39 and the lever |40 is pulled down, releasing the contact arm |35 whereupon it makes contact with the arm |31, thus closing the circuit across jacks H and M in the ZI column.

I Although the magnet coil |38 is described as fast" acting and |39 as slow acting, it is obvious that they could both be of the same speed and either fast or slow acting without departing from the invention. And any of the relays RI to RIB, inclusive, may have the reset coil return Wire thereof arranged with the switch, such as is shown at |28 to 3|, inclusive, so that the reset operation may be accomplished by either an upper or a lower brush, and independently of the resetting operations of other relays in the device.

In a preferred form of the invention, shown in Figures 3, 4, 5, 6 and '1, relays Ri to Ri inclusive, of the type Ra, above described; RIS, R20 of the type Rb; and R20 and R2I, ofthe type Rc above described, are mounted on a. suitable strip of material |66, supported behind the panel 85 by end pieces |1| and |12. v

These relays have their coils, contact arms, and switches connected as shown diagrammatically in Figure 2 with the exception that a flush receptacle |63 is'provided so that the connector cord ||0 may be detached from the master control unit making the same easier to handle.

Suitable top, back and bottom plates |68,y |89 and |10, member up with the front panel 8,5 and the end plates |1| and |12, and thereby form a dust-proof casing for the elements of the master control unit.

Suitable supports IBI, |62 which may be made in any desired form are provided for supporting the master control unit in convenient relation to the plug board of a record controlled device, for example, these supports may be hooked over the opened door |13 of a tabulating machine as shown in Figure 9 and the jacks in the plug board |00 and the jacks of the plug board 85 of the control unit may be interconnected in any desired arrangement.

An alternate form of relay suitable for use in the master control unit is shown in Figure 8 in which an arm |14 pivoted on the jack |15, and shown in the reset position makes contact with an extension of the jack |15. The arm |14 has a strip of insulating material |00 set in and adapted to support a back strip |8|. This last strip is made preferably of hardened steel, and has its lower end in the shape to form a knife edge. The knife edge is engaged by a hook shaped member |33 which is also preferably of hardened steel and wnich is carried by the armature |82.

'I'he actuating magnet coil |18, which may be made in any suitable form is adapted, when energized by an impulse via the jack |86, to pull the amature |82 down and release the knife edge from the hook |83, whereupon the lever |14 breaks contact with the jack |16 and makes contact with the jack |11 due to the tension of the spring |85.

The reset armature |84, shown slightly distorted in Figure 8 as to its normal position, is attracted by the reset magnet coil |19 when an electrical impulse passes therethrough, whereupon the lever |81 bears upon the strip |80 and causes the arm |14 vto assume its original position (as shown in Figure 8).

Having described an embodiment of the invention, some examples of its use in connection with a tabulating machine will now be given to show the increased flexibility ofl these machines and the consequent saving in time and the number of times the cards must be handled when the master control unit is interconnected with the elements of such machines.

Suppose it is desired to print a list of selected stencil numbers for addressing envelopes and indicate that these stencils will apply to a Letter A which will be mailed to all customers who have purchased f in the vhosiery department and the dress department and corset and underwear department, but who have not purchased in the house dress and negligee department during the months of April, May or June only.

Heretofore, the method of accomplishing this result has required the following steps:

(a) The sorting machine is set up with its selector arranged to function only on digits corresponding to April, May and June, and its brush is set for the column on the card corresponding to the first of the three departments. All of the cards are then run through the sorting machine. The cards selected by the sorting machine in this run are again run through the sorting machine (its brush having been set for the column corresponding to the second department). The cards selected by this run of the sorting machine are again passed through the machine with its brush set to the column corresponding to the third department. The result of this series of sortings will be the cards of those ,who bought in the three departments in these months.

- (b) Run the selected cards through' the sorting.

machine again to eliminate those who did buy in the fourth or last named department. The result of this sorting is two groups of cards, namely:

"Wanted cards-those who bought in the firsty three mentioned departments and not in the fourth department, and

Those who bought in all four departments. 'I'he latter are not used, and

(c) The wanted cards are run through a tabulating machine to print a list thereby accomplishing the desired result.

(d) After obtaining the result all of the cards are re-sorted and arranged in their original order or sequence.

By use of the master control unit herein described in connection with the elements of the tabulating machine, the same problem is accomplished in the following manner: Y (a) All ofthe cards are run through a tabulat-- ing machine which rejects data from every card not wanted, and makes the desired selections, gives the result (c) without requiring re-assorting and arrangement (d) In accomplishing this new result the cards are original order or sequence.

The present tabulating machine has its relays lpermanently associated with other apparatus from which they can not be disconnected; this invention contemplates the employment of disassociated relays as hereinbefore described.

Using the'master control unit in connection with the tabulating machine in the problem just given, the actuating coil of one relay thereof is connected by means of a plug Wire to brush jack DU34 corresponding to column 34 used for the hosiery department. If a punched hole appears at the upper brushes in this column the contacts of this relay will at that time be closed.

The actuating coil of a second relay thereof is connected to brush jack DU39 corresponding to column 39 used for the dress department. If a punched hole appears at the upper brushes in this column the contacts of this relay will at that time be closed. g

The actuating coil of a third relay thereof is connected to brush jack DU33 corresponding to column 33 used for the corset and underwear department. If a punched hole appears in this column the contacts of this relay will at that time be closed.

The actuating coil of a fourth relay thereof is connected to brush jack DU4| corresponding to column 4| used for the house dress or negligee department. If a punched hole appears ,at the upper brushes in this column the contacts of this relay will at that time open.

The contacts of these four relays are connected in series so that if the first, second and third relays are actuated (due to purchases in the corresponding columns) and the fourth relay is not actuated, a known or what may be termed an actuating impulse will pass therethrough and the desired result is obtained. The action of these four relays is furtherlimited by two other relays which permit them to function when punched holes appear in horizontal rows corresponding to April, May and June, which, in4 this case, are the 5, 6 and 1 rows.

If all four relays are actuated no result is obtained because the fourth relay breaks contact, leaving the circuit open and thereby preventing the actuating impulse from passing from the sensing means to a relay |92 in the control section ofthe tabulating machine which breaks the control circuit and causes the printing mechanism to operate.

The foregoing is given to show that by this improved method the number of operations in connection with a given problem may be reduced from four to one. The actual operation of the machine previously described will now be given.

'I'he diagram of connections for this problem is shown in Eigureil and a circuit diagram shown in Figure 10 showsthe relays used and the action of the circuits.

Jacks DLI! and DLZII are connected to E|1 and EI--B respectively to print the ledger number. Jacks DLZI, DL22 and DL23 are connected to El-i, E|4 and EI-3 respectively to print the customers sheet number, and jacks DL24 and DL25 are connected to' E|2 and E|| respectively to print the line number upon which the customers name appears. Ledger, sheet and line number together constitute the identification of the customer. These connections just referred to are from -and to points located in the'plug board |08 of the tabulating machine.

From the card, Figure I. it will be noted that for the months of February to July inclusive, the hosiery department is located in column 34, the dress department is located in column 39, and the corset and underwear department is located in column 33, so plugs from DU33, DU34 and DU39 on plug board |00 are connected to jacks C in plug board 85 in columns 1, 8 and 9, respectively, which, referring to Figures 9, 10 and 2, lead to the actuating coils 91 of relays R1, R8 and R9.

The jack in the M row, in column 1 on plug board 85 which will be called M1, is connected to H8, M8 is connected to H9, and M9 is connected to HID, so that when all three oi the relays 1, 8 and 9 operate, a circuit is completed from H1 to HID. This may be easily followed by referring to Figures 9 and-l0. When the relays Rl, R8 and R9 operate, assuming for the time being that the other sides of these coils are connected directly to the side of the line of opposite polarity to that of the upper brushes, the contact arms 93 in these three relays move to the right and make contact with the contact arms 95 and a circuit can be traced from H in R1 to H in RIU.

From the card, Figure 1, it will be noted that for the months of February to July inclusive, the house dress or negligee department is in column di, so a plug connection is made from DU4I in plug board |00 to the jack C in column I0 in plug board 85 which is the same as connecting it to the coil 91 in relay R|0 (Figure 10).

The jack B|0 is connected to jack C4, and H1 is connected to DL4 (in plug board |00) so that an impulse (hereinafter termed actuating impulse) from the lower brush, due to a punched hole in column Il of the card, will pass via the plug cable to H1, via the contact arms 93, 95 in relay R1 to M1, via the cable from M1 to H8, via the contact arms 93, 95 in relay R8 to M8, via the cable from M8 to H9, via the Acontact arms 93, 95 in relay R9 to M9, via the cable from M9 to H|0; and, if the relay RHI has not been actuated because the customer did not buy in the house dress or negligee department and no hole appears in column 4| of the card, the impulse passes from H|0 via the contact arms 93 and 94 of relay R|0 to BID and via the cable from BIO to C4, thereby energizing the actuating coil 91 of the relay R4, thereby breaking the control circuit of the tabulating machine as will be presently described.

Due to the presence o! a punched hole in column 4| of a card passing through the tabulating Y machine, the coil 91 in relay R|0 is actuated and the contact arm 93 breaks contact with the arm 84, lin which case the impulses sent out by DL4 do not reach the coil 91 in relay R4 as there is no circuit therethrough, this being broken between 93 and 94.

For controlling the machine a plug connection is made from the jack DU3 to the right hand jack in row FU, and ordinarily a connection would be made from DL3 toI the corresponding end jack in row FL', but since it is desired that the machine break control and print only when the conditions of the problem are fulfilled as described above, the contact arms 93, 94 of relay R4, terminating in the plug board 85 as H4 and B4 respectively, are connected in series with DL3 and the end jack in the row FL, by a plug cable from DL3 to H4 and a cable from B4 to the end jack in row FL, sol that when the coil 91 in relay R4 is actuated by the impulse from DL4 via the relays R1, R8, R9` and RHI, (the conditions above referred to corresponding to the problem having been fulfilled) the contact arm 93 breaks contact with the arm 94, thereby opening the circuit between DL3 and the end jack in FL, and causing the machine to stop and print.

But the conditions oi the problem are that these purchases apply to the months of April, May or June only. This is taken care of by the relay R22. The return wires from the other sides of the coils 91 in relays R1, R8, R9 and R|0 are connected by means of a plug wire from the jack |04 to the H jack in column Z2 and switches |03 and |06 are thrown to the off position. A plug cable connects from the B jack in column Z2 to the jack which is of opposite polarity to that of the upper brushes in the tabulating machine.

The magnet coil |39 of relay R22, via the jack CZ2, is connected to DL1 and the coil |38 there of, via the jack XZZ, connected to DL9, the 1 column on the card corresponding to the month of April and the 9 column corresponding to the month of June, so that the presence of a hole in column 9 on the card causes arm |35 to make contact with the arm |36, whereupon the return wires of the coils 91 in relays R1 to RIU inclusive are connected toI the line until an impulse emanating from a hole in column 1 in the card actuates the c'oil |39, thereby breaking the Contact between arms and |35 and rendering the relays R1, R8, R9 and RID inoperative.

Therefore, with this arrangement a card meeting all conditions of the problem, except the months, does not cause the machine to register or print. The shunt plug 84 is connected to the end jack in the shunt jacks, row FS, and the major shunt plug 83 is connected as shown. The switches on the plug board |00 are connected as shown with the irst group of counters El on list and E2 on non-list", and with minor control, "automatic reset, and automatic start, in the "on position.

These switches are shown and described in the Lake Patent No. 1,775,132, above referred to, and are illustrated in Figure l of said patent and Figures l0, 10 and 10b, the latter of which constitute circuit diagrams of said machine. If it were desired to list every record which passed through the sensing means, the switches of the plug-board |00 could be thrown to List, in which event the identification of all records would be printed and the information (in columns A, B, C, D, etc.) would be printed for only those records meeting the conditions of the problem. However, in the description, the machine is set to list only those records which meet the conditions of the problem El Vbeing set on list and the other accumulators on non-list", and the "minor control and automatic reset switches being in the on position.

A plug wire from the jack M4 to the printing bank jack E2| is provided and this bank prints a l in the column A of the form provided for that purpose, such as that shown in Figure l2, and the printing bank jacks EI-I to EI--1 inclusive, connect to printing members which print the ledger, sheet and line numbers, as before mentioned.

It will .be noted that in this form the lines are stepped upward. I'he reason for this is that the numeral l is printed in the A column due to a total taking operation instituted as follows: The machine having been set i'or tabulating or nonlisting operation, and assuming that the machine is operating and feeding cards, when a card which satisfies the requirement of the particular chine the jacks DLI 9, DL2II, DL2I, DL22, DLZS, DL24 and DL25 are connected directly to EI-1, EI-l, EI-5, EI--I, EI-S, EI-2 and EI-I respectively to record the ledger, page and line number.

The machine control section is next connectedI selected) four of the relays of the type Ra arevr connected by means of plug wires to the jacks FLI, FL2, FLS and FL4 in which the other side of the windings of the ilrst four magnets of the control terminate. Referring to Figure 11 it will be noted that relays S, 4, 5 and 6 are used in this connection. These relays are shownrdiagrammatically'as RS, R4, R5 and R6 in Figure 2- and it will be noted that the contact arm SS normally makes contact with the arm 95 thus closing a circuit from B to H in each respective column.

To include these relays in the circuit (FUI to FU! inclusive, having been connected to DUS), FLI is connected to B6, FL2 is connected to B5, FLS is connected to B4, FIA is connected to BS, and HS, H4, H5 and H6 are connected by means of a branch plug wire to DLS which is the lower brush in the third column.

'I'he operation of any (one or more) of these relays will break the control circuit and cause the machine to stop and print, andy plug wires connect MS, Ml, M5 and M6 to E24-5, EZ-S, E2-1 and B22-S respectively so that when any one `of these relays operates, 'contact is broken between H and B and contact is established between H and M. For example if relay S operates, contact breaks between B3 and HS and contact is established between HS and MS, the latter being connected via a plug wire to the accumulator jacks El-I.

The connections to the C jacks of the actuating coils Il o! these relays will be described as applied to each portion of the problem, and the return wires o! these coils are connected by a plug wire from Jack |02 to HIS, and BIS is connected by a plug wire to the jack IIB (which connects to the side of the power source of opposite polarity to that of the lower brushes).

The relay III normally has its arms 9S, 94 contacting across B and H, so that the return wires of the actuating coils of relays S, l, l and 6, are connected to an pposite polarity to that o! the lower brushes.

The actuating coil of relay I is connected by a plug wire, from CIII to DUN so that a punched hole in column 21 of a card (put there because the customer requested that no mail be sent'out) would send an impulse through the actuating coil o! relay I0, the contacts across BIII and HIII would be broken, and the actuating coils oi' relays S, 4, l and l, would be disabled and that particular 'card would not be lected.

The major control SS is rendered inactive by plugging l,as shown in Figure 11.

In connection with that portion of the problem relating to the Letter A which will be sent to customers who have bought dresses (column S9 on the card) or coats (column SS on the card) at any time during the season, but who have not bought millinery (column I on the card) .during May, June,'or July, jacks DUS8 and DUSQ are Jack DU5I is connected to CI2 (the actuating coil of relay I2).

Jack DLI is connected to one of the ljacks in the common or bus section L (for example LI) whereby any of the other L jacks may be plugged into, whereby an actuating" impulse emanating from a punched hole in the fourth column may be delivered to aplurality of points. A plug wire leads from the jack L2 to HIS, MIS is connected to HI2, and BIZ is connected to C6, so that if the relay I3 is operated and relay I2 is not operated, an actuating impulse can pass from DLI via LI, L2 to HIS, via the contact arms of the relay IS to MIS, from MIS to HIZ, via the contact arms of the relay I2 to` BIZ, and from BIZ via the plug wireto CE whereby the relay 6 will operate, breaking control and causing the machine to take a total and print a one via the printing bank E2-8, and the other information (ledger, sheet and line) from columns I9 to 25 inclusive of the card by means of the printing banks EI-l to EI-I inclusive, listing the same card when it reaches the lower brushes.

The return wires from the actuating coils of relays IS to II are connected together and t0 jacks |01 and |08 so, since relay IS is operated from the upper brushes, a plug wire is used to connect the jack |08 to the jack IIS which is of opposite polarity to that of the upper brushes.

The connections for the return wire of the actuating coils of relay I2, as well as the return wire of the actuating coils in the relay I I, will be presently described showing how they can be actuated only as of the months oi May, June and July.

In connection 'with that part of the problem relating to the Letter B" which will be sent to customers who have bought sportswear (column 40 on the card) this season but not during the months of May, June and July, the jack DUIU is connected by means of a branch plug to jacks CI I and CIl which lead to the actuating coils of relays II and Il of the master control unit. 'I'he Jack Mil is connected by a plug wire to the jack LS of the common bus (which is adapted to receive an actuating impulse from DL4 as above described).

The jackgHIl is connected by a plug wire to HII and BII is connected by a plug wire to C5, the actuating coil of relay 5 (previously described), and a plug wire from LS to MH may lead an actuating impulse to MH, and this impulse will pass from MI4 via the contact arms 95, 9S of relay I4 to HH, via plug wire to HII, via contact arms 9S, 94 of relay II to BII, and

via a plug wire to C5 (the actuating coil of reA lay 5), if a hole in column 40 has actuated relay Il but has not actuated relay I I, due to no purchases during May, June and July, and if the actuating coil of relay 5 has not been disabled by the relay I0 due to a punched hole in column 21 as previously explained, the relay 5 is actuated thereby breaking control, and an impulse is passed via the plug wire from M5 to ES-T.

Relays I I and I 2 are controlled as of May, June and July as follows: The return` wires o! the actuating coils in relays 'I to I2 are connected together and to jacks IM and IUS. Jack IM is connectedby a plug Wire to HZZ and a plug wirey in column I0 in the card sending an impulse from DLII via .a plug wire to XZI, the return wires of the actuating coils of relays 1 to I2 are connected to the side of the line of opposite polarity to that of the upper brushes and an im-v pulse to that actuating coil of v'any relay inv this group would operate the'same, for example, an. vimpulse froml DUII via the plug wireto CI! would actuate the relay I3.

An impulse due to a hole in column l of the card from DLI via theplugwire to CZ! and to the coil I33 causes the arms |35 and |33 to break contact with each other, thereby disconnecting the return wires of the actuating coils of relays 'I to I3 inclusive from the-line so that an' impulse, at that time, cannot through these coils.

From thev card, it will be seen that' a punched hole in column I appearing in the horizontal '6 row of the card corresponds to the month oi May and a punched hole in column Il appearing in the horisontfal 3 row of the card corresponds to the month of July. so the control as oi' these months is taken care of by connecting the return wires ofthe actuating coils in this group tothe other side of the line by means of an impulse emanating from a punched hole in column i3 corresponding l to the month o! July and. by disconnecting theml bymeansofan impulseemanating i'roma' punched hole in column 3 corresponding to the month of May, and holes punched in the wanted columns in rows corresponding to other months, Vhave no eiTect upon the machine.

'nie connections for Athe next portion of the problem relate toa Letter C" which .is to be sent out to customers who have .bought furniture, column Il on the card. or (not and) domesticrugs, column 4l, but who have'not bought draperies, column 4B this seasom .A branch plg'wire connects-fromDU and,

-b non to cio which leads to the actuating con oi' relav'II. A plug wire connects 'DUII to CII` which leads tothe actuating coil of relay Il. y A plug wire connects the bus Jack L4 to MIO, HIB is connected by a plug wire tcHil, andBiI is connected by a plug wire to C4 which leads tothe actuating coil .of relay 4. and the Jack. M4 is connected'by a plug wire to the counter Jack lill-3.' A hole occurring in either column u or I9 or in both u 'and-49 would cause an impulse to pass 'via Cil to the actuating coil of relay i3 closing the contact arms across Mil a'nd HIC, and an actuating impulse emanating from column I of the card would pass from DL3 to thel bus jacks L, from L'4 to Mil. from MII via the contact arms of relay I3 to Hit, from HII .to HIB, from Hil `via'the contact arms of relay I3 to -BII (if relay Il has not operated due to a punched hole e in column Il). from Bil to C4, whereupon the relay I would operate thereby breaking the control circuit between HI and Bland establishing a circuit across Htand Ml. I'he control circuit being broken. no impulse can now frompm to EL3, therefore instituting a total taking peration and the machine would stop feeding records and print a' total of one via EI--I in the C column of the form shown in Figure 13, and the\ ledger, sheet and line number would print at the beginning oi' the next card cycle.

Ii' apunchcd hole had also appeared in column 43 of the card showing that: the customer had bought draperies. the relay I3 will have operated inwhich case the actuating impulse would -not pass to the relay l, the control would not be broken and that particular card would not be se- 75 iected.

` the In the connections for that portion of the problern relating to a "Letter D" which will be mailed out to those who-have bought in mens furnishings. (column 33 on the card) this season, relay I1 is vused and DU38 is connected by a plug wire to'fCI'I.' A plug wire connects L5 to HI1 and a plug wire connects Mil to C3 which leads to the actuating coil of relay 3, so that a punched hole in column, 33, due to a purchase Lin thatdepartment would actuate the relay I1 and establish a circuit via the contact arms from MI'I to HI1 thereby allowing an actuating impulse to'pass from DLl via the -bus jacks LI, L5, to HI1, to MIT and on to C3 and through the winding of the coil 31 thereof. This would actuate the relay 3,

that it is connected to the side of the line of opposite polarity to that of'the'lower brushes.

The reset plugs I2I and -I22 are connected together and to the lower'brush jack DL2. Therefore the reset coils of the relays in group RI to RII in the master control unit receive an impulse Now with the machine and themaster control unit connected up as above described, the cards are run through the machine once only', andthe desired multiple result is obtained. One customer may be selected for more than one letter if the card meets .the conditions of the problem, and the cards of customers who have previously requested that no Jected. r l

Many other connections may be made between the elements of the master control-unit and the tabulating machine for the solution of many problems which cannot be done on the machine alone. but as these are innumerable only illustrations arev herein given to describethe use of the master control unit. in connection with a tabulating machine.

Although the examples of the use of the master control unit given herein were in connection with department store "customer control the utility of this device is by no means confined to customer controlf'. A tabulating machineunder control of the master control 'unit can perform with unI been heretofore impossible, due to the fact that in this unithave all operative points terminating in Jacks `or switches. making them selectively connectable". Theseoperative points are: v

Each end of the magnet winding of the actuating coil ineach relay, l.

Each end o! the magnet winding lc'oilineach relay,

mail be sent them; will be ref sol oi vthe reset 

